Hydraulic precussion hammer

Details Hydraulic precussion hammer Hydraulic precussion hammer

1995-06-15

1997-08-05

Smith, Scott A.

Tool driving or impacting

Impacting devices

Hammer head constitutes piston of drive motor

173207, 91300, 91303, B25D 914

Patent

active

056532954

ABSTRACT:
The invention relates to a hydraulic percussion hammer comprising a piston (1), a pressure accumulator (7) in the high pressure circuit, a main valve (8) alternately conducing a high and low pressure to at least one of the pressure surfaces (2,4) of the piston (1) for making the piston (1) move reciprocally, and a tool (3) which the piston (1) strikes, and, for the purpose of controlling the main valve (8), a control pressure valve (9) which opens when the pressure exceeds a set value. According to the invention, the control pressure valve (9) is placed in such a way that the spindle (27) of the control pressure valve (9) is connected from one end to the high pressure circuit of the hydraulic percussion hammer. Furthermore, for the purpose of adjusting the maximum and minimum operating pressure of the hydraulic percussion hammer the other end of the spindle (27) of the control pressure valve (9) comprises a control space (29) connected through the hydraulic ducts to at least two pressure control devices (30,31,32,33) connected hydraulically in parallel or in series.

REFERENCES:
patent: 4474248 (1984-10-01), Musso
patent: 4817737 (1989-04-01), Hamada et al.
patent: 4858702 (1989-08-01), Piras
patent: 4899836 (1990-02-01), Venot
patent: 5064005 (1991-11-01), Krone
patent: 5392865 (1995-02-01), Piras

Affiliated with

Also associated with

Rating

Hydraulic precussion hammer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulic precussion hammer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic precussion hammer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1068476